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Radio - JR & Spektrum DSM > My experience with the DX7 spread spectrum radio
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Quote 
Quote 
The DX7 and 7202 are identical

Are they made by the same company, Futaba?
The 7202 is JR - Spektrum frankenstein it into the DX7.
11-30-2006 Over year old.
 
 
midwestpilot
Elite Veteran
Location: Crystal Lake, IL

got mine yesterday...

yea me!!!

In life there is no spacebar!

Rich Erikson AMA 6175
11-30-2006 Over year old.
HOMEPAGE  
 
 
hootowl
rrProfessor
Location: Garnet Valley, Pa.

The transmitter itself seems cheaply constructed. Is it, or do you have to hold one in your hand to make that conclusion?

'Blessed is the man who expects nothing, for he shall never be disappointed'
11-30-2006 Over year old.
HOMEPAGE  
 
 
smity777
Veteran
Location: California

Quote 
The transmitter itself seems cheaply constructed. Is it, or do you have to hold one in your hand to make that conclusion?
I got mine and it feels as good as my very old 8103. I don't think it feels cheep.
11-30-2006 Over year old.
 
 
midwestpilot
Elite Veteran
Location: Crystal Lake, IL

It seems as nice as any 7 channel would be.. it is the 7202 case...

I have not held a real 7202 to comment on a direct comparison.. but I like the radio... I sold my 9c to get it and they are pretty nice... more money as well.. so dollar for dollar it is a nice feeling radio... sticks are smooth. I fly thumbs(no comments on that please )and I liked the way it felt. I had on my 9c extra rubber grips on the back that I may get and see if they will fit because I really got used to that feel. pics are of my old 9c



In life there is no spacebar!

Rich Erikson AMA 6175
11-30-2006 Over year old.
HOMEPAGE  
 
 
smity777
Veteran
Location: California

Augusto

Can you respond the path you took to setting up your Gyro and Rev limiter/Gov. Thank you.
11-30-2006 Over year old.
 
 
Tioli
Veteran
Location: Kona, Hawaii

Flew my new DX7 this morning with my Sceadu EVO 50. The range checked out to 100 paces beyond which I couldn't see well enough to know if it was still working or not. This was following the written procedure.

I have been flying a spektrumized 6102 thanks to Hilgert. When I set-up the new radio I copied everything from the 6102 including the trims. When I actually flew the Evo, I foundt that I needed to add one more click of trim on the DX7 than on the 6102. In other words, if I had one click of right cyclic on the 6102, I had to add one more click on the DX7. I don't know what this really means in terms of what is going on inside the radio.

I was surprised by how much more responsive heli is with the new radio. I assume that's the resolution. It took a little getting used to, and I even considered adding more expo, but decided I'd just get used to it.

I'm not thrilled with the lack of a throttle cut, though the throttle recovery function does work well if I can get used to it.

I'm not thrilled with the trainer rocker arm position either, but I don't use it that often anyway.

I love the countdown timer, simple but effective.

All in all, I'm thrilled with the new radio. It looks fine and feels great. I'll not go back to 72mHz, unless I'm flying someone else's plane. I won't recommend the DX7 in my shop because it'll cut down on a large percentage of crashes, which will cut into our profits...just kidding...

Big Island RC Helis
12-02-2006 Over year old.
HOMEPAGE  
 
 
electriciancarl
Veteran
Location: East Mesa Az.

Just installed and flew my new DX7 today. Amazing difference in feel and responce as compaired to my DX6. The heli was more stable in a hover and felt "soft" for lack of a better word. It seemed much less sesative to minor stick movements. The ff responce was still soft but very quick. It was almost as if I had expo programmed in (i double checked, no expo). Im not sure if its communication speed, software, or the ball bearing gimbels, but honestly, I don't care. I just love it!
12-02-2006 Over year old.
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

Four times better resolution at the servos would explain your observation.

Four times better in spite of the fact that Spektrum advertises the SAME 1024 resolution for both the DX6 and DX7.

And you wonder why I keep questioning them ?
12-02-2006 Over year old.
HOMEPAGE  
 
 
electriciancarl
Veteran
Location: East Mesa Az.

I should have told you i'm still using the 6 ch rx. The difference I feel is all in the tx. Are there any significant differencesin the 6ch rx and the 7 (other than seperating the rx's)?

Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.
12-02-2006 Over year old.
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

> Are there any significant differencesin the 6ch rx and the 7 (other
> than seperating the rx's)?

Latency is a little lower when using AR7000 receiver compared to using the AR6000 due to a faster data rate on the new DSM2 protocol. That and the channel order are the only two noticeable differences. Both offer true 1024 resolution when used with the DX7 tx.

> Four times better in spite of the fact that Spektrum advertises the
> SAME 1024 resolution for both the DX6 and DX7.

AirWolfRC,
I know your not going to stop on this one; but, the actual Spektrum system included with the DX6 is, in fact, 1024 resolution. It is the JR front-end used on the DX6 tx that causes the seemingly low resolution. I don't think Paul was given nearly as much control over the tx front in on the DX6 as he was given on the DX7. Thus, although he designed the Spektrum part as true 1024, the end system didn't deliver that.

- John
12-03-2006 Over year old.
 
 
electriciancarl
Veteran
Location: East Mesa Az.

Thanks John

Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.
12-03-2006 Over year old.
 
 
bparro
Veteran
Location: indianapolis,in

Are there any online places selling these yet? It is 350 at the lhs,hoping I could find it cheaper
12-03-2006 Over year old.
 
 
electriciancarl
Veteran
Location: East Mesa Az.

I looked but never found it for less than $350.00.

Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.
12-03-2006 Over year old.
 
 
bparro
Veteran
Location: indianapolis,in

I saw 309 and 297 quoted in the main discussion from two different hobby shops. But not mail order places.
12-03-2006 Over year old.
 
 
Zephyros
Heliman
Location: So Cal

Hi guys, I found the DX7 for $309 at myrcsupply.net, they have free shipping through Friday the 8th. Now I need to see if Mrs.Claus is going to give me the $309, LOL.
12-03-2006 Over year old.
 
 
electriciancarl
Veteran
Location: East Mesa Az.

That listing is for mode 1. I'm not sure but I belive mode 1 has throttle / aileron on the right and elevator / rudder on the left. Check before you buy. Can anyone give more input to this please?

Treat me good, I'll treat you better. Treat me bad, I'll treat you worse.
12-03-2006 Over year old.
 
 
AdrianM
Senior Heliman
Location: Tampa,FL

I just flew my Trex 450 with a full DX7/AR7000 sertup. Felt just as quick as my Stylus. With my Syylus I get a very tiny glitch from time to time when I am close. It never does this whenthe heli is futher away. With the DX7 it was rock solid everywhere.

Programming was easy even though I had no JR radio experience. It was neat that your can manage your gyro, dual rates and expo a few diffrent ways. Right now I have my gyro on a switch (HH/Rate) with the same gain in all flight modes. You can also easliy set it up so the gain is diffrent in every flight mode.

The Tx is not as heavy or as solid as a pro radio like the Stylus, 10C or 9z but it also cost 3-4x less and it can do 90% of what those radios do (100% of what most pilots use).

I am very happy with this radio but I miss the VR knobs and sliders, more 3 position switches, the spring loaded toggle (snaproll) switch (I assign this to increase or decrease mix values so I can tune plank mixes in flight without needing to land and program the radio), the switch assignment freedom and the unlimited mixing freedom of the Stylus. That said there is nothing I need to do that the DX7 can't do. I am only limited in a few things i'd like to do. I am looking forward to seeing something like a DX9 based on a 9303 chassis. That would be the ultimate radio.
12-03-2006 Over year old.
HOMEPAGE  
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

Quote 
AirWolfRC,
I know your not going to stop on this one; but, the actual Spektrum system included with the DX6 is, in fact, 1024 resolution. It is the JR front-end used on the DX6 tx that causes the seemingly low resolution. I don't think Paul was given nearly as much control over the tx front in on the DX6 as he was given on the DX7. Thus, although he designed the Spektrum part as true 1024, the end system didn't deliver that.
You're right, I'm not going to let it go.

The typical user expects the ENTIRE system to live up to the advertised specifications, NOT just some specific internal part and it turns out the complete system they were selling can't possibly live up to what is advertised.

Spektrum conveniently neglected to mention that part.
.
12-03-2006 Over year old.
HOMEPAGE  
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

So you'll continue this never forgiving crusade in every thread that discusses a Spektrum system for the rest of eternity - As long as you have a breath no one will ever live it down.
12-03-2006 Over year old.
 
 
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